RF Emission Guard Case with Antenna Cutouts

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Solution Overview

Problem

Portable wireless devices emit harmful electromagnetic radiation, exposing users to potentially carcinogenic low-level nonionizing energy, with existing shielding solutions either providing inadequate protection or compromising device functionality.

Innovation Solution

A lightweight, customizable electromagnetic shielding case made from materials like expanded monel metal alloy foil and fine copper mesh, which reduces electromagnetic and radio frequency radiation exposure while allowing optimal device functionality by redirecting radiation away from the user.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If electromagnetic shielding materials are placed between the antenna and the user, then radiation exposure to the user is reduced, but the signal transmission capability of the antenna is blocked

Engineering Contradiction:

Improveradiation exposure to userVSAvoidsignal transmission capability

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The shielding material is selectively positioned only in regions where radiation protection is needed, with strategic cutouts and openings placed adjacent to antenna elements. This local differentiation allows the shield to block radiation in protected zones while maintaining signal transmission pathways through the cutouts, resolving the contradiction between protection and functionality.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The shielding structure is divided into multiple segments including a main shield portion with cutouts, and an overclipped external frame that can be separately positioned. This segmentation allows different portions of the shield to serve different functions - some areas provide radiation blocking while others provide signal transmission paths, enabling simultaneous achievement of protection and signal capability.

Inventive Principle:

Principle #1Segmentation

2Object-affected harmful factors

If a complete shielding case is used to protect from radiation, then radiation protection is maximized, but device functionality and signal reception are compromised

Engineering Contradiction:

Improveradiation protectionVSAvoiddevice functionality

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

Rather than providing uniform shielding across the entire device surface, the shield incorporates localized cutouts and openings in specific regions where antenna elements are positioned. This selective shielding approach maintains complete protection in most areas while preserving essential signal transmission pathways, thus maintaining device functionality.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The shield provides more than complete coverage but intentionally leaves partial openings for signal transmission. This partial action approach applies shielding excessively in protected zones while deliberately excluding coverage in antenna zones, achieving optimal balance between protection and functionality.

Inventive Principle:

Principle #16Partial or excessive action

3Object-affected harmful factors

If shielding materials are added to reduce radiation, then protection effectiveness increases, but device weight and complexity increase

Engineering Contradiction:

Improveprotection effectivenessVSAvoiddevice weight

Core Design Contradiction:

Object-affected harmful factorsVSWeight of moving object

Solution Approach 1:

The shield utilizes thin film or shell structures that provide effective radiation shielding while minimizing additional weight. The flexible shield can be conformally attached to the device surface, providing maximum protection with minimal material thickness and corresponding minimal weight addition.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The shield may incorporate composite material structures that combine shielding properties with lightweight characteristics. By using composite materials, the shield achieves effective radiation blocking capability while keeping the added weight to a minimum, resolving the contradiction between protection effectiveness and weight.

Inventive Principle:

Principle #40Composite materials

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Significantly reduces electromagnetic and radio frequency radiation exposure to users, providing nearly complete protection in some cases without affecting the device's ability to transmit and receive signals, thus minimizing health risks associated with long-term exposure.

Implementation Method 1

Methodology Applied

Scientific EffectElectromagnetic radiation redirection: Reflection

Implementation Method 2

Methodology Applied

Scientific EffectElectromagnetic shielding: Absorption (EM radiation)

Data Source

PatentUS9761930B2Radio frequency emission guard for portable wireless electronic device

Publication Date: 2017.09.12 STINGRAY SHIELDS CORP

AI summary

A radio frequency and electromagnetic emission shield employed on wireless personal and portable electronic devices, containing one or more layers of radio frequency (RF) or electromagnetic (EM) screening material, shielding the user from harmful RF or EM radiation, or a redirection antenna that receives all RF signals, and redirects those signals away from the user. The RF emission shield may be contained within a plurality of outer layers, providing a secure fit to a wireless electronic device and an outer layer providing an easy grip for the user.